2020 GMC Sierra 2500HD Wheel & Fit Specs

Last reviewed September 30, 2026

Some values on this page are still waiting for a second source. We show what we have and mark it; confirm against your owner's manual before you buy.

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Wheel specs and lug torque

Lug nut torque 140 ft-lbs (190 Nm)

Dimensions, weight and fuel

Fuel Gasoline

Worth knowing about the 2020 Sierra 2500HD

  • Torque. Tighten lug nuts to 140 ft-lbs in a star pattern with a torque wrench, and re-check after the first 50 miles. This figure is from the owner's manual; an impact gun will overshoot it.
  • Fuel. Tank size depends on cab, box and engine, and the manual's long-box row prints 136.3 L beside 28.0 gal, so no single figure is given.